Daewoo DUB-2850GB Service Manual page 16

CP-780 Service Manual
4.1.3. PINNING
QFP 128pin
1
2
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Symbol
VSSP2
VSSC4
VDDC4
VDDA3(3.3V)
VREF_POS_LSL
VREF_NEG_LSL+HPL
VREF_POS_LSR+HPR
VREF_NEG_HPL+HPR
VREF_POS_HPR
XTALIN
XTALOUT
VSSA1
VGUARD/SWIO
DECDIG
VP1
PH2LF
PH1LF
GND1
SECPLL
DECBG
EWD/AVL (1)
VDRB
VDRA
VIFIN1
VIFIN2
VSC
IREF
GNDIF
SIFIN1/DVBIN1 (2)
SIFIN2/DVBIN2 (2)
AGCOUT
EHTO
AVL/SWO/SSIF/ REFO/REFIN (2)
AUDIOIN5L
AUDIOIN5R
AUDOUTSL
AUDOUTSR
DECSDEM
Short Description
Ground
Ground
digital supply to SDACs (1.8V)
supply (3.3 V)
positive reference voltage SDAC (3.3 V)
negative reference voltage SDAC (0 V)
positive reference voltage SDAC (3.3 V)
negative reference voltage SDAC (0 V)
positive reference voltage SDAC (3.3 V)
crystal oscillator input
crystal oscillator output
Ground
V-guard input / I/O switch (e.g. 4 mA current
sinking capability for direct drive of LEDs)
decoupling digital supply
1st supply voltage TV-processor (+5 V)
phase-2 filter
phase-1 filter
ground 1 for TV-processor
SECAM PLL decoupling
bandgap decoupling
East-West drive output or AVL capacitor
vertical drive B output
vertical drive A output
IF input 1
IF input 2
vertical sawtooth capacitor
reference current input
ground connection for IF amplifier
SIF input 1 / DVB input 1
SIF input 2 / DVB input 2
tuner AGC output
EHT/overvoltage protection input
Automatic Volume Levelling / switch
output / sound IF input / subcarrier
reference output / external reference
signal input for I signal mixer for DVB
operation
audio-5 input (left signal)
audio-5 input (right signal)
audio output for SCART/CINCH (left
signal)
audio output for SCART/CINCH (right
signal)
decoupling sound demodulator
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